Emergency cartridge-type shut-off valve



Nov. 255 1930. L. D. LOVEKIN EMERGENCY CARTRIDGE TYPE SHUT-OFF VALVE Filed Oct. 1s. 1,927

Patented Nov. 25, 1930 LUrIIIin n.mum iesAmman,I msywaimi,as noa mmso eomm, I

or PH A ELPHIA, rnn'nsYLvAmn, AI ooiasoianrroiv or WEST VIRGINIA 1,782 '760. L i up PATENTOFFICE] EMERGENCY camaimmwe $I-IUT-FF vALvn V Application filed 0m 12 I if invention relates to thermostatically releasedIshut-oif valves for cutting off the fuel supply to a boilerlor other container of liquid fuel.

heated 'by the combustion of the The main p'urposejof invention 'is to provide a readily removable and replaceable cartridge forholding parts in spring-pressed I to close the fuel valve; 0

cartridge within the pocketcomprising a holding device and fusible material, and to restrainthe valve against spring-pressed closure by a pin adapted to punch the fusible material when the: material softens 1 without waiting for it to melts. I v

A further purpose is to provide a springpressed fuel valve closure adapted toube released by reason of the heatingyof a fusible material; withIa guide at each end and a noncircular section for use in oscillating the valve for the purpose of grinding the valve ontoitsseat. I

further purpose is to provide novel I mounting means-fora valve upon a stem and afusible disc within a pocket.

Further purposes will appear in the fication andIin theclaimsfl* I I I- I prefer to illustrate my inventiongby one form only, appearing in twoslightly'varymay be'supportedw I ing constructions, among the many in which it, may appear, selecting a form I which I is practical, Iefiicient reliable and vinexpensive and which at the same time wellillustrates II the principles involved I I I Figure 1 is a central longltudinal section through my valve and a fitting in Which it I Figure 2 is a reduced sideel-evation ofthe valve seen in Figu'rel." I I I Flgure 3 1s a reduced-sectioncorrespond lee-: 5 Serial no; 225,943.;

ing to Figure l, illustrating a slight modification.

I Figures 4 and5are reduced side elevations I illustrating two of the locations in which the valve may be placed.

lower end at 7 for intimate contactwith any bo1ler8, or for connection to any member adaptedto recelve and communicate the temperature of the heating liquid (here treated as water) to the support 6; I 'Upon'the support is mounted a valve 9 hereshownfias a globe valve and havingits valve seat 10 axially in line with the sup Thexfuel ordinarily considered is gas, but

it may be "liquid; :and passes through the I valve from pipe 11 to pipe 12when the valve I is open as inthe figure. I I I I Within the support and in close proximity to the fitting, boiler or other device upon which my automaticshut-off valve ismount-I showing the valve only, l I

I I. I I In'the drawing slmilar numerals lndloa'te ed, I install a cartridge comprisingan outer I shell 13, azfusible element 14:; (shown as a flat discinl Figure 1 and as in inverted cupin Figure 2) and a sleeve- 15 which holds the I fusible element in place and at the same time performs guiding functions for valve spin d1e 16, I I

The sleeve 15 is threaded intothe top of the shell 13 and is providedwith external thread at 17 to permit removal of the entire cartridge bymeans of a correspondingly threaded socketinserted fromaboveq Th I I 90 P01131011 of the V I end of the socket engaging sleeve is radially slotted. I

The outside of the shell is preferablyfproivided with a slight upward flare so astomake wall of a recess 22 in a cap member 23 screwed into the valve body at 24;.

The interior of the cap forms a cylindrical loose guide at 25 for a cylindrical outwardly directed skirt 26 upon the outer side of the valve 20.

The valve is thus loosely guided below by locating the lower end of the stem within the bore of the sleeve 15, and above by the skirt 26 within the cylinder 25.

For convenience of manufacture so that valve and skirt, if desired, may be made separate from the stem, I have shown the stem as provided with a boss 27 which the valve engages, and have provided a portion of the stem above the valve with a section larger than that of the stem extension 28, which portion is threaded to receive a nut 29. The nut is shown as locked by pin 30.

The stem extension 28 is slotted at 31 to provide easy hold for a suitable tool for grinding the valve to its seat.

In operation'the parts are put in place as shown and the valve remains open with the spring 21 under compression during normal operation of the burner, the fusible element being heated by conduction from the metal portion 8 of the boiler through the metal support 6 and shell 13, and the heat from the water of the boiler. It will be evident that the heat conducted whether through the shell or directly from the water is all of it the heat from the excessively highly heated water within the boiler.

If the heating liquid becomes excessively hot, the fusible element 14 softens to a point where it is no longer able to support lower stem 16 against the pressure of the spring 21 and the stem 16 is driven through the disc, closing the valve.

The valve remains closed until the cap 23 is removed, when a new fusible element is put in place and the valve reset.

The replacing of the fusible element requires removal of the cap and removal of the cartridge in its entirety from the body of the valve, removal of the sleeve 15 from the cartridge shell 13 and replacing of the fusible element 14 with a new one, with subsequent reassembly of the different parts with the body of the valve.

I show in Figure 3 minor differences of detail from that of Figure 1.'

The cap 23 is extended upwardly a sufiicient distance to permit the stem 28 to extend 7 well beyond the body of the valve, the shell 13 carrying the fusible element is placed closer to theouter end of the shank support 7, and'the inverted cup form of fusible element at the bottom of the shell is used instead of the flat disc element of Figure 1.

A further detail difierence'lies in making the sleeve 15 of uniform diameter throughout its length insteadof making the upper portion of the sleeve of reduced d1ameter,.as

in Figure 1, which may in some cases be advantageous in permitting the use of a smaller socket when removing the cartridge.

In Figure 1 the fusible element 14 rests upon a shoulder 32 formed by counterboring the upper end of the vsleeve 13, an arrangement that gives considerable room below the fusible element for the downward movement of the stem during valve closure, while in Figure 3 the space for movement of the stem is provided by making the fusible element in the form of an inverted cup which, resting upon the bottom of the shell 13, brings the fusible element closer to the source of heat.

The valve 20 and the stem are integral, avoiding the necessity for the boss 27 and the holding mechanism by which the stem. and valve are united in Figure 1.

The construction is unusually compact, may be quickly and easily reset without interference with the fuel or water connections beyond shutting off the fuel supply, and has been found to be remarkably uniform in the temperature at which it operates, as the spring may easily be made strong enough to punch the fusible element at the first sign of softening of the element, and the temperature of softening of the material is substantially uniform.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the structure shown, and I, therefore, claim all such in so far as they fall within the reasonable spirit and scope of my invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. In a fuel cut-off valve for insertion in the fuel supply line to a boiler, a globe valve body, an extension integral therewith, a disc valve in the body, spring-pressed toward closure, a fusible element inside the extension supporting the disc valve from closure and connections between the boiler and the element adapting the element to heat by conduetion from the heat of the water in the boiler and to soften for operation of the cut-off when the boiler temperature becomes undersirably high.

2. In a fuel cut-off valve for insertion in the fuel supply line to a boiler, a body having a lateral opening, inlet and outlet compartments and a laterally extending shank for heat conducting connection to a boiler, in combination with a valve assembly insortable and removable at said opening and including a valve and a fusible element having heat conducting connection with the shank whereby it is heated by the excessive heat of the water in the boiler and controls the operation of the'valve.

"1 hearse V 3. In a fuel cut-off valve for insertion in the fuel supply line to a boiler, a body hav-,

ing a lateral opening, inlet and outlet compartments and a laterally extending shank for heat conducting connection to a boiler, 1n comblnation with a valve assembly nsertable and removable at said opening and including a valve and a fusible element mounted mside the shank in heat conductmg connection with the shankand controlling the operation of the valve.

4. In a fuel out-oil valve for insertion in a the fuel supply line to a boiler, a body havand controlling the operation of the valve v by an adaptation to fail if subjected to undesirably high temperature.

I 5. In a fuel cut-off valve the fuel supply line to a boiler, a body having a lateral opening, inlet and outlet compartments and a laterally extending shank for heat conducting connection to a boiler in combination with a valveassembly insertable and removable at said opening and in cluding a valve stem, a valve mounted thereon, spring-pressed toward closure, a cupshaped metal container seating in the shank,

a sleeve threaded into the open end of the cup guiding oneend of the stem and a heat element inside the cup, supporting the stem in valve open position and controlling the operation of the valve by an adaptation to fail if subjected to undesirably high tem-' perature.

6. In a fuel cut-ofi' valve for insertion in the fuel supply line to a boiler, a body having a lateral opening, inlet and outlet compartments and a laterally extending shank for heat conducting connection to a boiler in combination with a valve assembly insertable and removable at said opening andineluding a valve stem, a valve mounted thereon, spring-pressed toward closure, ametal container seating in the shank surrounding and guiding one end of the stem, a' heat element in the form of an inverted cup inside the container presenting its inverted bottom to the end of the stem, supporting the.

valve in valve open position and controlling the operation of the valve by an; adaptation to fail if subjected to undesirably high temperature.

7. In a fuel cut-0E valve for insertion in I the fuel supply line to a boiler, a body having a lateral opening, inlet and outlet compartments and a laterally extending shank ed socket. w

for insertion in high.

for heatconducting connection to a boiler i in combination with a valveassembly insertable and removable at said ppening and ,includinga valve stem, a valve mounted there on,,spring-pressed toward closure,-a cupshaped metal container seating in theshank, a fusible elementi in the container adapted to hold the valve normally open and'asleeve threaded into the open end of thejcup guid ing one end 'of th'e stem and presenting a threaded end outside of thecup for use in withdrawing clip by means of a thread- Bl In: a fuel cut offj valve for' insertion in the fuel supply lineto a pqilena body hav ing a latera 1 opening, inlet-and outlet com-V partments and a laterally" extending shank for heat conducting connection to a boiler in combination with a valve assembly insertable and removable at said opening and in cluding a valve stem, a valve mounted thereon, spring-pressed toward closure, a cupshaped metal container seating in the shank, a fusible element in the container adapted to hold the valve normally open and a sleeve threaded into the open end of the cup guiding one end of the stem and presenting a threadedplug which is radially slotted for tool engagement,

9. In a fuel cut-0H valve for insertion in the fuel supply line to'a boiler, a globe valve body having a partition wall between inlet and outlet compartments, and a valve seat around a perforation in the wall and a side opening into one of the compartments in line with the perforation, in combination with a disc valve adapted to close upon the seat, having a stem extending through the perforation and removable through the opening, a

cartridgein the other compartment including a fusible element, and removable through the perforation and through the opening, the fusible element being adapted to engage the valve and hold the valve away from its seat,

a cap closing the opening, a spring co1npressed between the disc and the cap and connections between the element and the boiler adapting the element to heat by con- 7 duction from the boiler and to soften when the heater temperature becomes undesirably 10. In a fuel cut-off valve for insertion in the fuel supply line to a boiler, a body hava lateral opening, inlet and outlet compartments and a laterally extending shank for heat conducting connection to a boiler, in combination with a valve assembly insertable and removable at said opening and including ,a valve stem, a valve mounted there on, spring-pressed toward closure, a cartridge seating in the shank and guiding the stem, and adisc heat element inside the cartridge, supporting the stem in valve open position andcontrolling the operation of the valve by an adaptation to fail if subjected to undesirably high temperature.

11. In a fuel cut-0E valve for insertion in the fuel supply line to a heater, a body having a lateral opening, inlet and outlet compartments and a laterally extending shank for heat conducting connection to a boiler, in combination With a valve assembly insertable and removable at said opening and including a valve stem, a valve mounted thereon and a heat element compressed by said stem in movement of the valve toward closing'and adapted to soften and permit such closing movement When subjected to undesirable high temperature.

LUTHER D. LOVEKIN. 

